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Please answer this:6+1 =

Original Message (ID '372501') By Steve:
Replace the dot between a and Sin and a and Cos with a space or a star: In[1]:= Simplify[a.Cos[x]^2 + a.Sin[x]^2] Out[1]= a.sin^2(x)+a.cos^2(x) In[2]:= Simplify[a Cos[x]^2 + a Sin[x]^2] Out[2]= a In[3]:= Simplify[a*Cos[x]^2 + a*Sin[x]^2] Out[3]= a